US12465949B2 - Sonotrode having optimized slot geometry - Google Patents

Sonotrode having optimized slot geometry

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Publication number
US12465949B2
US12465949B2 US18/727,829 US202318727829A US12465949B2 US 12465949 B2 US12465949 B2 US 12465949B2 US 202318727829 A US202318727829 A US 202318727829A US 12465949 B2 US12465949 B2 US 12465949B2
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United States
Prior art keywords
slit
ultrasonic vibration
vibration element
longitudinal
section
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US18/727,829
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US20240416387A1 (en
Inventor
Matthias SCHWEITZER
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Herrmann Ultraschalltechnik GmbH and Co KG
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Herrmann Ultraschalltechnik GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • B23K20/106—Features related to sonotrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps

Definitions

  • the present invention relates to an ultrasonic vibration element which can be set into resonant vibration with a longitudinal ultrasonic vibration in a longitudinal direction, wherein the ultrasonic vibration unit is bounded in the longitudinal direction on the one hand by a rear face and on the other hand by a front face, wherein the front face is either intended to come into contact with a further ultrasonic vibration element in order to transmit the ultrasonic vibration to the further ultrasonic vibration element, or is designed as a sealing surface or adjoins to a sealing surface which is intended to come into contact with a further ultrasonic vibration element in order to transmit the ultrasonic vibration to the further ultrasonic vibration element.
  • the ultrasonic vibration element usually has a circumferential lateral surface which connects the rear surface and the front face.
  • Such an ultrasonic vibration element which is designed as a sonotrode, is known from EP 2 774 746 B1.
  • the front face is designed as a sealing surface.
  • the ultrasonic vibration element could also be designed as an amplitude transformer or as a converter.
  • the sonotrode is a half-wave resonator, i.e. the entire length of the sonotrode along the longitudinal direction corresponds to half a wavelength of the resonant vibration of the sonotrode.
  • This ultrasonic vibration element has a series of slits in the lateral surface, the slits having a slit length l in a slit longitudinal direction, a slit width b in a slit transverse direction and a slit depth t in a slit depth direction, the slit longitudinal direction, the slit transverse direction and the slit depth direction being arranged orthogonally to one another and the slit depth t being selected such that the slit completely penetrates the ultrasonic element, and the slit length l being greater than the slit width b.
  • the slits are used, among other things, to reduce stresses occurring within the material due to excitation with a longitudinal ultrasonic vibration, making it possible to excite the sonotrode with a higher vibration amplitude.
  • the vibration amplitude and the position of unwanted vibration modes can also be influenced by the dimensioning and positioning of the slits.
  • the slit not being axially symmetrical to a slit longitudinal axis along the slit longitudinal direction in a sectional view.
  • the slit according to the invention is designed asymmetrically in relation to the slit longitudinal direction.
  • the slit longitudinal direction and the longitudinal direction can include an angle that is less than 25°, preferably less than 5° and preferably 0°.
  • the desired vibration result is therefore achieved by the non-axisymmetric design of the slit.
  • two slits are provided, the two slits being arranged axially symmetrically to an axis along the longitudinal direction.
  • four slits are provided, with two of the four slits being arranged axially symmetrically to an axis along the longitudinal direction.
  • Providing more than one slit improves the mechanical stresses in the ultrasonic vibration element. The position of unwanted secondary resonances is also improved.
  • the ultrasonic vibration element has a first, second and third section, wherein the first section has a thickness which is smaller than the thickness of the third section, wherein the second section has a varying thickness and connects the first section to the third section.
  • the three sections are arranged one behind the other in the longitudinal direction.
  • the first section is preferably arranged so that it comprises the front face, while the third section comprises the rear face.
  • the first section has a sealing surface intended to come into contact with a material to be processed.
  • the third section has a recess in which at least one piezo element is arranged.
  • the ultrasonic vibration element is therefore very compact, whereby the vibration is generated within the ultrasonic vibration element with the aid of the piezo elements and can be transmitted through the ultrasonic vibration element to the material to be processed.
  • This ultrasonic vibration element thus integrates the sonotrode, amplitude transformer and converter into a single element.
  • the slit is bounded by two longitudinal walls and two cross walls, a first of the two longitudinal walls being further away from the slit longitudinal axis, at least in sections, than a second of the two longitudinal axes.
  • a slit can be produced by first producing a slit with two parallel longitudinal walls and then making a recess in the first longitudinal wall.
  • the first longitudinal wall is arranged further away from a longitudinal center axis of the ultrasonic vibration element than the second longitudinal wall.
  • the two cross walls are concavely curved, with the two cross walls preferably being curved with the same radius of curvature.
  • the first longitudinal wall is designed to be concave in at least some sections.
  • FIG. 1 a perspective view of an ultrasonic vibration element of the invention
  • FIG. 2 a partially sectioned plan view of the ultrasonic vibration element of FIG. 1 .
  • FIG. 1 shows a perspective view of an embodiment of an ultrasonic vibration element 1 according to the invention.
  • a front face 2 designed as a sealing surface 2 can be seen, which is intended to come into contact with a material to be processed.
  • the rear face (not shown in the figure) is arranged opposite the front face 2 .
  • the front face 2 and the rear face are connected to each other via a circumferential lateral surface 3 .
  • the ultrasonic vibration element 1 has three sections in the direction of its longitudinal axis 9 , namely a first section 6 , the thickness of which essentially corresponds to the width of the sealing surface 2 , a third section 8 , which is designed to be significantly thicker than the first section 6 , and a second section 7 , the thickness of which varies and which is arranged between the first section 6 and the third section 8 .
  • the ultrasonic vibration element has a recess in the third section 8 , in which a plurality of piezo elements 5 are arranged, with which the ultrasonic vibration element 1 can be set into ultrasonic vibration.
  • the piezo elements 5 have a through opening through which a screw 18 engages in this embodiment.
  • An upper part 17 is pressed against the piezo elements 5 with the aid of a nut 16 , so that the piezo elements 5 are held between the upper part 17 and the ultrasonic vibration element 1 .
  • four slits 4 are provided that completely penetrate the material in a depth direction.
  • the slits have a special shape.
  • the slits have two cross walls 10 as well as a first longitudinal wall 11 and a second longitudinal wall 12 .
  • the slits extend along a slit longitudinal direction 15 , which in the example shown forms an angle of 0° with the longitudinal direction 9 of the ultrasonic vibration element, i.e. runs parallel to it.
  • the two cross walls 10 of the slits are curved.
  • the second longitudinal wall of the slit 12 is also parallel to the longitudinal axis 9 .
  • the longitudinal wall 11 of the slit 4 has a concave curvature.
  • the slits according to the invention could be made by first making a slit with two parallel longitudinal walls and then making a corresponding notch in the first wall 11 .
  • Several notches 13 , 14 can also be made in one of the slits, as can be seen in the two slits 4 arranged closer to the rear face.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

An ultrasonic vibration element which vibrates with a longitudinal ultrasonic vibration, the vibration unit is bounded in the longitudinal direction by a rear face and a front face, the front face is either intended to come into contact with a further vibration element or is designed as a sealing surface or adjoins a sealing surface which comes into contact with a material to be processed, wherein a circumferential lateral surface is provided, which connects the rear surface and the front face, the vibration element has a slit in the lateral surface, the slit has a slit length, a slit width and a slit depth, the slit depth being selected such that the slit completely penetrates the ultrasonic element, and the slit length being greater than the slit width, wherein the slit is not axially symmetrical to a slit longitudinal axis.

Description

FIELD OF THE INVENTION
The present invention relates to an ultrasonic vibration element which can be set into resonant vibration with a longitudinal ultrasonic vibration in a longitudinal direction, wherein the ultrasonic vibration unit is bounded in the longitudinal direction on the one hand by a rear face and on the other hand by a front face, wherein the front face is either intended to come into contact with a further ultrasonic vibration element in order to transmit the ultrasonic vibration to the further ultrasonic vibration element, or is designed as a sealing surface or adjoins to a sealing surface which is intended to come into contact with a further ultrasonic vibration element in order to transmit the ultrasonic vibration to the further ultrasonic vibration element.
BACKGROUND OF THE INVENTION
The ultrasonic vibration element usually has a circumferential lateral surface which connects the rear surface and the front face. Such an ultrasonic vibration element, which is designed as a sonotrode, is known from EP 2 774 746 B1. In this ultrasonic vibration element, the front face is designed as a sealing surface. The ultrasonic vibration element could also be designed as an amplitude transformer or as a converter.
As a rule, the sonotrode is a half-wave resonator, i.e. the entire length of the sonotrode along the longitudinal direction corresponds to half a wavelength of the resonant vibration of the sonotrode.
This ultrasonic vibration element has a series of slits in the lateral surface, the slits having a slit length l in a slit longitudinal direction, a slit width b in a slit transverse direction and a slit depth t in a slit depth direction, the slit longitudinal direction, the slit transverse direction and the slit depth direction being arranged orthogonally to one another and the slit depth t being selected such that the slit completely penetrates the ultrasonic element, and the slit length l being greater than the slit width b.
The slits are used, among other things, to reduce stresses occurring within the material due to excitation with a longitudinal ultrasonic vibration, making it possible to excite the sonotrode with a higher vibration amplitude. The vibration amplitude and the position of unwanted vibration modes can also be influenced by the dimensioning and positioning of the slits.
When dimensioning the slits, maximum permissible mechanical stress values within the material are often also taken into account. However, the introduction of slits usually leads to additional, undesirable vibration modes whose excitation frequencies should be as far away as possible from the excitation frequency of the main frequency intended for operation.
In the prior art, the disadvantages associated with an arrangement of the slits parallel to the longitudinal direction are described in detail. In EP 2 774 746 B1, the slits were therefore arranged at an angle to the longitudinal axis of the sonotrode.
SUMMARY OF THE INVENTION
Based on the described prior art, it is therefore the problem of the present invention to provide an alternative slit geometry and arrangement that meets the requirements for the maximum permissible mechanical stress values, has a high vibration amplitude and does not require slits inclined to the longitudinal axis of the sonotrode.
This problem is solved by the slit not being axially symmetrical to a slit longitudinal axis along the slit longitudinal direction in a sectional view.
In contrast to the known slits, the slit according to the invention is designed asymmetrically in relation to the slit longitudinal direction.
It is then not necessary to arrange the slit at an angle as in the prior art. Instead, the slit longitudinal direction and the longitudinal direction can include an angle that is less than 25°, preferably less than 5° and preferably 0°.
The desired vibration result is therefore achieved by the non-axisymmetric design of the slit.
In a preferred embodiment, two slits are provided, the two slits being arranged axially symmetrically to an axis along the longitudinal direction.
In a particularly preferred embodiment, four slits are provided, with two of the four slits being arranged axially symmetrically to an axis along the longitudinal direction.
Providing more than one slit improves the mechanical stresses in the ultrasonic vibration element. The position of unwanted secondary resonances is also improved.
In a preferred embodiment, the ultrasonic vibration element has a first, second and third section, wherein the first section has a thickness which is smaller than the thickness of the third section, wherein the second section has a varying thickness and connects the first section to the third section. The three sections are arranged one behind the other in the longitudinal direction.
The different thicknesses allow the amplitude of the ultrasonic vibration to be adjusted or increased. Therefore, the first section is preferably arranged so that it comprises the front face, while the third section comprises the rear face.
In a preferred embodiment, the first section has a sealing surface intended to come into contact with a material to be processed.
This ensures that when the ultrasonic vibration element is excited, the sealing surface has a comparatively large oscillation amplitude of the ultrasonic vibration.
In another preferred embodiment, the third section has a recess in which at least one piezo element is arranged. The ultrasonic vibration element is therefore very compact, whereby the vibration is generated within the ultrasonic vibration element with the aid of the piezo elements and can be transmitted through the ultrasonic vibration element to the material to be processed. This ultrasonic vibration element thus integrates the sonotrode, amplitude transformer and converter into a single element.
In a further preferred embodiment, it is provided that the slit is bounded by two longitudinal walls and two cross walls, a first of the two longitudinal walls being further away from the slit longitudinal axis, at least in sections, than a second of the two longitudinal axes. Basically, such a slit can be produced by first producing a slit with two parallel longitudinal walls and then making a recess in the first longitudinal wall.
Preferably, the first longitudinal wall is arranged further away from a longitudinal center axis of the ultrasonic vibration element than the second longitudinal wall.
As a result, the mechanical stresses within the ultrasonic vibration element could be further reduced. In a further preferred embodiment, the two cross walls are concavely curved, with the two cross walls preferably being curved with the same radius of curvature.
Furthermore, it is advantageous if the first longitudinal wall is designed to be concave in at least some sections.
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantages, features and possible applications will become clear from the following description of a preferred embodiment and the associated figures.
It shows:
FIG. 1 a perspective view of an ultrasonic vibration element of the invention and
FIG. 2 a partially sectioned plan view of the ultrasonic vibration element of FIG. 1 .
 DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a perspective view of an embodiment of an ultrasonic vibration element 1 according to the invention. A front face 2 designed as a sealing surface 2 can be seen, which is intended to come into contact with a material to be processed. The rear face (not shown in the figure) is arranged opposite the front face 2. The front face 2 and the rear face are connected to each other via a circumferential lateral surface 3.
The ultrasonic vibration element 1 has three sections in the direction of its longitudinal axis 9, namely a first section 6, the thickness of which essentially corresponds to the width of the sealing surface 2, a third section 8, which is designed to be significantly thicker than the first section 6, and a second section 7, the thickness of which varies and which is arranged between the first section 6 and the third section 8.
In this embodiment, the ultrasonic vibration element has a recess in the third section 8, in which a plurality of piezo elements 5 are arranged, with which the ultrasonic vibration element 1 can be set into ultrasonic vibration. The piezo elements 5 have a through opening through which a screw 18 engages in this embodiment. An upper part 17 is pressed against the piezo elements 5 with the aid of a nut 16, so that the piezo elements 5 are held between the upper part 17 and the ultrasonic vibration element 1.
To prevent the mechanical stresses within the material from becoming too great and to optimize the position of unwanted secondary resonances, four slits 4 are provided that completely penetrate the material in a depth direction.
According to the invention, the slits have a special shape. The slits have two cross walls 10 as well as a first longitudinal wall 11 and a second longitudinal wall 12.
The slits extend along a slit longitudinal direction 15, which in the example shown forms an angle of 0° with the longitudinal direction 9 of the ultrasonic vibration element, i.e. runs parallel to it.
The two cross walls 10 of the slits are curved. The second longitudinal wall of the slit 12 is also parallel to the longitudinal axis 9. The longitudinal wall 11 of the slit 4 has a concave curvature.
Basically, the slits according to the invention could be made by first making a slit with two parallel longitudinal walls and then making a corresponding notch in the first wall 11. Several notches 13, 14 can also be made in one of the slits, as can be seen in the two slits 4 arranged closer to the rear face.
REFERENCE SIGNS
    • 1 Ultrasonic vibration element
    • 2 Sealing surface, front face
    • 3 Lateral surface
    • 4 Slit
    • 5 Piezo element
    • 6 First section
    • 7 Second section
    • 8 Third section
    • 9 Longitudinal axis, longitudinal direction
    • 10 Crosswall
    • 11 First longitudinal wall
    • 12 Second longitudinal wall
    • 13, 14 Notch
    • 15 Slit longitudinal direction
    • 16 Nut
    • 17 Upper part
    • 18 Screw

Claims (20)

What is claimed is:
1. An ultrasonic vibration element which can be set into resonant vibration with a longitudinal ultrasonic vibration in a longitudinal direction,
wherein the ultrasonic vibration element is bounded in the longitudinal direction on one hand by a rear face and on another hand by a front face,
wherein the front face is either intended to come into contact with a further ultrasonic vibration element in order to transmit the ultrasonic vibration to the further ultrasonic vibration element, or is designed as a sealing surface or adjoins a sealing surface which is intended to come into contact with a material to be processed and to transmit the ultrasonic vibration to the material to be processed,
wherein a circumferential lateral surface is provided, which connects the rear face and the front face to one another,
wherein the ultrasonic vibration element has a slit in the lateral surface,
wherein the slit has a slit length I in a slit longitudinal direction, a slit width b in a slit transverse direction and a slit depth t in a slit depth direction, the slit longitudinal direction, the slit transverse direction and the slit depth direction being arranged orthogonally to one another, the slit depth t being selected such that the slit completely penetrates the ultrasonic element, and the slit length I being greater than the slit width b,
wherein the slit is not axially symmetrical to a slit longitudinal axis along the slit longitudinal direction in a sectional view,
wherein the slit is bounded by two longitudinal walls and two cross walls, a first of the two longitudinal walls is at least in sections further away from the slit longitudinal axis than a second of the two longitudinal walls, and
wherein the slit is produced by first producing a slit with two parallel longitudinal walls and then making a recess in the first longitudinal wall.
2. The ultrasonic vibration element according to claim 1, wherein the slit longitudinal direction and the longitudinal direction enclose an angle which is less than 25°, or less than 5°, or 0°.
3. The ultrasonic vibration element according to claim 2, wherein four slits are provided, two of the four slits being arranged axially symmetrically to an axis along the longitudinal direction, and wherein the ultrasonic vibration element has a first, second and third section, the first section having a thickness which is smaller than a thickness of the third section, wherein the second section has a varying thickness and connects the first to the third section.
4. The ultrasonic vibration element according to claim 3, wherein the first section has a sealing surface which is intended to come into contact with a material to be processed, and wherein the third section has a recess in which at least one piezo element is arranged.
5. The ultrasonic vibration element according to claim 4, wherein the first longitudinal wall is arranged further away from a center axis of the ultrasonic vibration element extending in the longitudinal direction than the second longitudinal wall, and wherein the two cross walls are concavely curved.
6. The ultrasonic vibration element according to 5, wherein the first longitudinal wall is concavely curved at least in sections.
7. The ultrasonic vibration element according to claim 2, wherein two slits are provided, the two slits being arranged axially symmetrically to an axis along the longitudinal direction.
8. The ultrasonic vibration element according to claim 1, wherein two slits are provided, the two slits being arranged axially symmetrically to an axis along the longitudinal direction.
9. The ultrasonic vibration element according to claim 8, wherein the ultrasonic vibration element has a first, second and third section, the first section having a thickness which is smaller than a thickness of the third section, wherein the second section has a varying thickness and connects the first to the third section.
10. The ultrasonic vibration element according to claim 9, wherein the first section has a sealing surface which is intended to come into contact with a material to be processed.
11. The ultrasonic vibration element according to claim 10, wherein the third section has a recess in which at least one piezo element is arranged.
12. The ultrasonic vibration element according to claim 9, wherein the third section has a recess in which at least one piezo element is arranged.
13. The ultrasonic vibration element according to claim 8, wherein four slits are provided, two of the four slits being arranged axially symmetrically to an axis along the longitudinal direction.
14. The ultrasonic vibration element according to claim 13, wherein the ultrasonic vibration element has a first, second and third section, the first section having a thickness which is smaller than a thickness of the third section, wherein the second section has a varying thickness and connects the first to the third section.
15. The ultrasonic vibration element according to claim 1, wherein the first longitudinal wall is arranged further away from a center axis of the ultrasonic vibration element extending in the longitudinal direction than the second longitudinal wall.
16. The ultrasonic vibration element according to claim 15, wherein the two cross walls are concavely curved.
17. The ultrasonic vibration element according to 16, wherein the first longitudinal wall is concavely curved at least in sections.
18. The ultrasonic vibration element according to claim 16, wherein the two cross walls are curved with the same radius of curvature.
19. The ultrasonic vibration element according to 15, wherein the first longitudinal wall is concavely curved at least in sections.
20. An ultrasonic vibration element which can be set into resonant vibration with a longitudinal ultrasonic vibration in a longitudinal direction,
wherein the ultrasonic vibration element is bounded in the longitudinal direction on one hand by a rear face and on another hand by a front face,
wherein the front face is either intended to come into contact with a further ultrasonic vibration element in order to transmit the ultrasonic vibration to the further ultrasonic vibration element, or is designed as a sealing surface or adjoins a sealing surface which is intended to come into contact with a material to be processed and to transmit the ultrasonic vibration to the material to be processed,
wherein a circumferential lateral surface is provided, which connects the rear face and the front face to one another,
wherein the ultrasonic vibration element has a slit in the lateral surface,
wherein the slit has a slit length I in a slit longitudinal direction, a slit width b in a slit transverse direction and a slit depth t in a slit depth direction, the slit longitudinal direction, the slit transverse direction and the slit depth direction being arranged orthogonally to one another, the slit depth t being selected such that the slit completely penetrates the ultrasonic element, and the slit length I being greater than the slit width b,
wherein the slit is not axially symmetrical to a slit longitudinal axis along the slit longitudinal direction in a sectional view, and
wherein the slit is bounded by two longitudinal walls and two cross walls, wherein the two longitudinal walls are parallel to each other, and a first of the two longitudinal walls has a recess that is located further away from the slit longitudinal axis than a second of the two longitudinal walls.
US18/727,829 2022-01-11 2023-01-09 Sonotrode having optimized slot geometry Active US12465949B2 (en)

Applications Claiming Priority (3)

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DE102022100500.3 2022-01-11
DE102022100500.3A DE102022100500A1 (en) 2022-01-11 2022-01-11 Sonotrode with optimized slot geometry
PCT/EP2023/050262 WO2023135068A1 (en) 2022-01-11 2023-01-09 Sonotrode having optimized slot geometry

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US12465949B2 true US12465949B2 (en) 2025-11-11

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EP (1) EP4463283A1 (en)
JP (1) JP2025501096A (en)
DE (1) DE102022100500A1 (en)
WO (1) WO2023135068A1 (en)

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US20240416387A1 (en) 2024-12-19
WO2023135068A1 (en) 2023-07-20

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